Tool head



NW, 16, 1943. 1.. MENZL 2,334,276

oo HEAD FiledFeb. 29. 1940 2 Sheets-Sheet l INVENTOR. LEo/v MENZL BY M A TTORNEY inverted plan view.

. a given mill roll Patented Nov. 16, 1943 Leon Menzl,

T Q 'QO Crestvvood; Ni- Y.,' assignor to 'Marlo .00., New York,.N. Y., acopartnership consiste,

ing of Haroldfiase andQharlesGersma Applicatien February 29,. 194d, Seria1 loQ32L386 24. Claims. (Cl. 10 52),.. f i

The invention relat'es" to the scraper tip and trash plate teeth for removing material from the grooved surfaces of mechanical rolls and more particularly of cane sugar. mill rolls. 'l-Ieretofore it has been customary to cut such teeth with'a shapertool or milling cutter advancing in' straight lines whereby tri'angular teeth were produced having straight point lines andfistraight base or 'root'lines in parallel relation toeachother. The object of the invention is to providerteeth cf the indicated type in a novel form whereby operative 'efficiency is increased and'waste of material in the cutting of. said teeth is reduced to a minimum. The invention contemplatesfurther the provision of novel apparatus whereby the novel teeth may be accurately and uniiormly produced in an economical and efficient manner.

Other more specific objects will appear from the description hereinafter" and the featuresof novelty will be pointed out inzthe claims.-

In the accompanying drawings which illustrate examples of the invention without defining thelimits thereof, Figs, 1 and 2 are diagrammatic views illustrating respectively the old form of scraper teeth andthe instantnovel form thereof; Figs. 3 and 4 are correspondingviews "respectively of the old and new trash bar plate teeth; Fig. 5 is a diagrammaticview of a cane sugar 'mill showing scraper bars and trashzbar plate with the novel front end elevation of the novelcutting apparatus; Fig. 'Z-is a longitudinal section thereof on the line 1-1 of 'Fig. 6; Fig: 8 isa horizontal section on the line 8-4 of Fig. 6, and Fig.9 is an In this improved tooth a, 'the' point line b and the line at the root of; 'thetooth-or' base line 0 are preferably both curved in arcs corresponding with the radius of the mill roll'd with which-said tooth is intended to cooperate;

that is the curvature of'the base line c of the tooth or is equal to the radius from the center of themill rolld to the peripheral surface thereof; or inother words to tooth-f, the point line b of -the tooth a 'is the same. as the radius from the center of the millroll d to thebase ofthe mill roll tooth r or in other words to the root g of a given groove of the mill roll (1. In some cases,.however, .the point line b of the tooth a may be astraight linewhich in .the point line .a of

practice extendsin approximate tangential relation to the root 9. of the mill roll gas shown'in Fig. 4.

The purpose of developingthe'novel'tooth a.

teeth in use; "Fig'. 6 is a and the curvature of at h. with resulting excessive tooth thusformed at best has contact only with t e" does not conforrrrto the "curs and .at in'g fit with emoves- H of which l5. "The trashbar plate is conducted from the 1 ed in proper'placein at'the point line'b; therootor'bas'e line 0, as

wellias at the sides of said tooth a.

As cl early shown in Figs. 1 and 3, it is evident that in a tooth generated by a. linearly recipro- ,"catingtool, considerable material is removed at the'rootor base line of" the tooth as indicated waste. Also a sidesurfaces of the associated'mill roll teeth becauseof its straight point and base lines F v surface curvature of the mill r'ollfior its groove at the base line thereof. AsiIlu'strated inFigs. 2 and 4, it is evident that with the novel tooth a having the desired curved base line cfno ex cessive"waste of material octhe same time a the point line e of the mill roll tooth and the associated groove ofthe mill roll is secured; if the oint line b of the toot a is also curved, perfect fit with the baseline g of the mill roll groove is also attained. 'Itwill be understood that the teeth of the 'roll scrapers and of the trash bar plates may be correspondingly developed to include the aforesaid novel features. '-In Fig. 5 which diagrammatically illustrates a 'cane'sugar milljlfl represents the top roll, the V are cleaned by the teeth of the top roll scraper l2, and 13 indicates the side rollo'f saidmill, thegrooves M of the roll l3 being 'cleaned by the teeth l6 whereby the material front roll l1 to the side roll 13 beneath the top roll Ill, has its teeth extending into meshing engagement. with the grooves l8 of the front roll H for cleaning said grooves l8. "It will be understood thatthe scrapers I 2 and I5, and the trash bar plate l8 are mountthe cane sugar mill in any and-well-knownway. teeth described hereinbefore may in any suitable manner andprefconventional 7 The novel be? produced "erablyareproduced'by the apparatus illustrated in Figs. 6 to 9 inclusive; which preferably com- "prises anattachment capable-of being readily embodied in a conventional shaper or well-known type.' l

v The aforesaidapparatus as shown includesan upright supporting member l9 provided with angle members extending therefrom in spaced parallel relation and consisting of upright webs 120 and horizontal flanges 2|; the latter are provided. at intervals with apertures 22 for the acperfect co-operatof the side roll scraper the base 125, as shown in Fig, 7.

. memberor arm 39 which a clapper block 43 by means of a pivot pin 44. The clapp r block .trated in Fig. 9, said tool end carrying a grooving A base is fasof the base 25, as illustrated in Fig. 7. A feedv I screw 3| is rotatably mounted in the opening 29 and is provided with .an annular flange 32and a hand wheel 33 which bear against opposite faces of the lug 28 against axial movement relatively to the lug 28 '15 to maintain the feed screw 3| without interference with the rotation of said feed screw 3| in the opening 29. Thehand wheel 33 is externally accessible for manually manipuating the feed screw 3| which extends inwardly of the lug 28 into thelongitudinal recess of IThe threaded portion, of 'th'ejfeed screw 3| is in screwthreaded engagement with an internally threaded nut 34 located in the longitudinal recess 39 and fastened in any suitable manner to a tool slide 3 5. The latter is slidably mounted on the base 25 betwee'n'the guide ribs, 2'! thereof and is maintained in slidable surface engagement with said base 25 by means of'retainers 36 secured on the ribs 21 by screwsr or the like 37, and projecting inwardly beyond said ribs 21 over the outer face. of said tool slide 35 asillustrated in Fig. 8. With the described arrangement, the

retainers 36 in association with the guide ribs 21 and the base 25 provide parallel spacedguideways in which the tool slide "35 is vertically movable by means of therfeed screw 3|- and hand wheel 33 for the purpose to be more fully set forth hereinafteri, V

The tool slide-35 at its upper portion includes outwardlyprojecting cheeks 38 located in spaced parallel relation and between which a swinging is pivotally'mounted by means of a pivot pin 40, saidmember or arm 39 having parallel side flanges 4| extending throughout part of its length in surface engagement withthe inner faces of the cheeks 38, as shown in Figs. 7 and 8. At its lower end, the swinging member or arm 33 is equipped with a clapper box 42 in is pivotally mounted 4.31s recessed to receive a tool support '45, as illussupport 45 at its lower tool 46 having a single cutting tooth 41 and fixed in place by means of I straps 48 and bolts 49 which also serve to secure the-tool'support45 on the clapper block 43; at, its

upper end the-toolsupport 45 carries a grooving comb 50 provided with' a plurality of cutting teeth 5| and fastened in place by means of a bolt 52. A spring 53 bears against: the member .or arm 39 and against the tool support 45 and permits the latter and the clapper block 43 to pivotally yield in one direction. 1 1 j The apparatus further includes means whereby the -operative parts thereof may bev readily connected with the operating mechanism of the shaper for actuatingvthe attachment in the intended manner. In the illustrated example, the means referred to consists fof al push-rod 54 having its one .end pivotally connected bynieans of a pivot pin 55 with lugs 55 projecting from the swinging member or .arm39; the opposite end-of member 13. shaperis then 7 I and push-rodfl54in a manner-"to swing the memwhich saidteeth. a If thepoint lines of spondingly curvedpthe particular scraper or ltrash bar plate being operated on is first cut or pivotally connected by means with similar lugs 58 carried the push-rod 54 is of a pivot pin 51 by a ram head 59 whereby said ram head 59 and its associated parts are coupled to the conventional shaper ram 6| which is diagrammatically illustrated by the dotted lines in Figs. 7 and 8. e

The apparatus shown in Figs. 6 to 9 inclusive, as previously stated, preferably comprises an attachment which is mounted on the shaper bed 24 in such a way that said attachment projects over the shaper table upon which the roll scraper or trash bar plate on which the teeth are to be cut isproperly mounted in any suitable manner.

In order to out the teeth a, so that they will fit the mill .roll and the grooving thereof, the tool support 45 is adjusted on the clapper block 43 ,mill roll with which the particular teeth are dethe tool 46 thus set I signed to co-operate. With in position, the feed screw means of the. hand wheel 33 to slide 35 to its high position on the supporting The operating mechanism of the started to act on the ram head 59 3| is actuated by her or arm 39.011 the pivot pin 40 and to thereby actuate the cutting-tool. and its tooth 4! in a cuttingarc. At, th'elfinish of the initial cut the tool slide 35 isfshifted downwardly by means of the feed screw' 3| and hand wheel 33 just, the tooth 41 of the cutting tool 46,to a new cutting position. It will be understood that in the meantimethe operating mechanism of the shaperhas operated to swing the arm ormember331and with it the, tool- 46 and its tooth 47 back Ito the initial position shown in Fig. 7 from which. position the cutting tool is again swung in a'cutting'arc about the pivot pin 40 to produce a how. out; oscillation of the swinging'memberfor arm 39 and the cutting tool 46 onrthe pivot pin tllis continued and the tool slide is periodically shifted to'adjust the'tooth no: saidv cutting .toolftol progressively advancing cutting positions. In thiswaythe base or root lines of the teeth a when. fully'cut are curved-on radii corresponding to the radius of the mill roll. with are-intended to co-operate.

the teeth aare to be correotherwise manipulated to-properly curve the sur face thereof. In the operation of producing the teeth a the latter in such case are cut inwardly .from this curved surface. With the novelteeth, excessive waste of materialin cutting is avoided, as previously stated herein and a perfect mesh with the grooves of the particular. mill roll is effected whereby removal of-material from the grooves of said "mill rolliseffcted in a mostefficient manner; The apparatus or attachment'whereby the novel teeth maybe produced is si'mple'in construction and operation; and wequires no particularly skilled supervision in its operation. While this apparatus is preferably constructed in the form of an attachment defsi-gnedffor embodimentina conventional; shaper Ina-chine, said apparatus may be otherwise'arranged as an independentmechanis'm operated in, any convenient way.

Various changes in the specific forms shown .anddescribed may be made within thescope of having a coupling member 60 H raise the tool to ada tool support,

of, a nut secured the claims without departing from'the spirit oi. the invention.

I claim:

1. An apparatus for roll scrapers and trash upright supporting fixed on an upright face of said supporting memher and provided with a longitudinal recess, a vertically movable tool slide slidably mounted on said base, a swinging arm pivotally mounted on said tool slide, a clapper block pivotally mounted on said swinging arm, a tool support on said clapper block, a tooth cutting. tool fixed on said means for pivotally actuating said swinging arm to operate said cutting tool in cutting arcs concentric to the pivot oisa'id swingin arm, a feed screw rotatably mounted on said base and extending into the longitudinal recess thereon said tool slide in threaded engagement with said feed screw, and a handwheel for rotating said feed screw relatively to said nut whereby said tool slide is vertically shifted relatively to said base to adjust said cutting tool to progressively advancing cutting positions.

2. An apparatus for cutting the teeth of mill roll scrapers and trash bar plates comprising upright supporting means, cutting means pivotally cutting the teeth of mill bar plates comprising an mounted on said supporting means and slidably movable relatively thereto in vertical directions, a reversible tool support pivotally mountedon said cutting means and partaking of the pivotal and sliding movements thereof, said reversible tool support being adapted to carry cutting implements at its opposite ends and to selectively member, an upright base ting arcs, and means set either of said cutting implements in operative position, means for pivotally actuating said cutting means to operate the activ cutting implement in cutting arcs concentric to the pivot of said cutting means, and means for shifting said cutting means relatively. to said supporting means in vertical directions whereby the cutting implement operative at the time is adjusted to progressively advancing cutting positions.

3. An attachment for shapers comprising supporting means adapted for mounting on the shaper bed, a tool slide slidably mounted on said supporting means, a tooth cutting device pivotally mounted on said tool slide, actuating means connected with said tooth cutting device adapted for connection with the operating mechanism of said shaper whereby said tooth cutting device is pivotally actuated to operate said cutting device in cutting arcs concentric to its pivot, and means for slidably shifting said tool slide on said supporting means to adjust said cutting device to progressively advancing cutting positions.

4. An attachment for shapers comprising supporting means adapted for mounting on the shaper bed, tooth cutting means including a cutting tool slidably and pivotally mounted on said supporting means, actuating means adapted for connection with the operating mechanism of said shaper whereby said tooth cutting means is pivotally operated to actuate said cutting toolin cutfor slidably shifting said cutting tool to progressively advancing cutting positions.

LEON MENZL. 

